Signaling system.



E. mnsons.

SIGNALING SYSTEM.

APPLIOATIOI FILED AUG. 20, 1808.

973,808, Patented Oct. 25, i9 0.

1n: balms pnnu ummnum mum-om. n c.

UNITED STATES PATENT OFFICE.

EMORY PARSONS, OF CHICAGO, ILLINOIS.

sxenauno SYSTEM.

Specification of Letters Patent.

Patented Oct. 25, 1910 Application flied August 20, 1908. Serial 80. 449,398.

To all whom it may concern: Be it known that I, EMORY PAnsoNs, citizen of the United States, residing at Chica'o, in the county of Cook and State of 1] mois, have invented a certain new and useful Improvement in Signaling Systems, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a art of this specificatio y invention relates to signaling systems,

and has for its object the provision of a ;novel system wherein it is possible for the various stations on a selective signaling line to selectively call any of the stations on the line.

More particularly my invention contemplates a plurality of signal receiving and sending stations all on the same line, together with novel meansateach station for calling selectively any station on, that line.

I Wlll describe my invention in detail in connection with the accompanying drawing illustrating one embodiment thereof Referr' to the drawin I have shown signaling me wires 1 an 2, which pass through all of the stations, which stations are preferably staggered throughout these wires 1 and 2, and which stations are preferably a central station A and auxiliary stations B, C, D and E. The central station A has someinstrumentalities which I prefer;

to place only at this station, although, 5 of shown in detail in' connection with the stacourse, it is possible to have all of the equip ment at slid the stations if necessary, but to simplify matters I have shown in this drawing the central station as thus bein uiprgad to call the various stations, and ?or t is reason ha'veprovided abattery 3, the positive pole of which is connected with the line wi're land a key 4, by means of which n ative battery current ma be connected with the line wire 2, thus to orm a closed circuit 'to operate the polar relays 5 at each substation. The polar relays 5 are provided with a floating armature which makes contact with one terminal when positive current flows throu h the relay and makes connection with file second terminal when the battery" current is reversed. The fur-.-

ther connections" of the polar relay 5 are tion E that are omitted for the sake of clearness thestation B, C and D.

Referrmg more' particularly to station E I have shown a battery 7, which is connected with the relay 8, so that when the armature 6 makes contact with the contact point 9, said relay 8 is operated, and by virtue of its armature causes a movement of the step-up mechanism 10 the required number i of notches to bring its lever 11 into electrical association with the spring 12, thus to close contact therewith, so as to operate when this contact is of sufiicient time duration to actuate the slow-acting relay 13 whereby the armature 14 of this slow-acting relay closes a circuit through the signal 15 and calls this articular station. A mere passing contact etween the lever 11 and the spring 12 is not of suflicient time duration to operate the relay 13, and it is only when the lever 11 stops inelectrical association with the s ring 12 that suflicient time is allowed for t e re ay 13 to operate thereby to actuate the bell 15. A reverse operation of the floating armature 6 makes contact withthe contact pin 16, thus to close circuit through the release magnet 17, which allows the'step-np mechanism 10 to fall back into its normal position. Thus to call any station from the central stat-ion A, it is necessary to step-up the mechanisms at the various-stations by means of the key 4, and the desired station will be signaled through the, agency of the slow acting relay 13; After the signal has been sent, the release key 18 is actuated, which closes circuit'through the battery 19 and a reversing relay 20, thus to operate thev reversin switch 21 and a current of a re.-

verse p0 arity is sent over the transmission lines 1' and'2 to cause an opposite movement of the respective armatures 6, thus to 0 erate the release magnet 17 and to restore til all to normal. position. v

I provide an impedance coil 22 at the farthest extremity between the line wires 1 and 2, which formsno part of this invention, but is used when my system is adapted for telephone purposes, and is shown in eluded, as it will then form part of the serial circuit. I further provide at each station B, C and D a key 23, whose front contact is preferably connected to ground, and whose lever is preferably connected through the agency of an impedance coil 23 with the line wire with which the particular sta-i tion is associated] The novel features of my invention will now be apparenhsupposing that statiort C for instance is desirous of calling station B, or any. other station on the line: the key number of impulses have been sent to op- 5 is a high resistance path, and of itselfdoes not permit suflicient current to thread the polar rela s 5 to operate them, b'ut'the operation of t e relay causes a closure of contacts through its associated armature, which is the same thing as is accomplished when operating the key 4. Thus operating key 23 sends the required impulses over the line wires and causes operation of the stepup mechanism 10 as'desired throu h the agency of the relay 25. When the esired erate'the step-up mechanism in position for the desired station, the key 2345 held' 'ii'n' itsclosed position du'ringthe time that a signal is: operating at the desired station and maintaining the closure of the contacts of the key 23 while this signal of the desired station is operatin effects another result at the station'A, which is as follows: VVhen-- everrelay 25 o'peratesit also operates relay 26, whieh'closes a contact and establishes a them in their normal condition to receive circuit through battery 27 and relay 28.

Thus relay 28 operates conjointly with the relay 25. "Vhen relay 28 operates, it releases a s ring29, which by means of the pin 30'ho dsa pivoted weighted bar 31 in position againsta stop 32. When relay 28 thus momentarily operates to release the spring 29' from the pin 30, the bar 31 tends to moveupwardly, but the rapid pulsations due to stepping up the selector mechanism at the required stations does not give a sufficient time interval to emit the bar 31 to move far enough to e ect a CllflllgiOf circuit conditions. When, however, the key 23 is held down for any length of time, relay 28 .remains in itsenergized condition,

and thus allowssufiicient time for the bar 31 with its associate contact to come upwardly and establish a circuit with the spring 33. It will be seen that when the bar 31 closes circuit with the spring 33, the same electrical condition results as results from operation of the release key 18, thereby sending current of a diflerentpolarity over the line wires 1 and 2'and releasing all of the mechanisms at the substations, thus putting another signal. It will be understood therefore'that each station B, C,- D and E has means for calling every other station.

The operation of the device will be understood, but to recapitulate: In the operation of the key 23 to call station E, for instancdassuming that it requires four im 'evaaoe larly described the preferred embodiment of my invention,what I claim as new and desireto secure by Letters Patent is:

, 1. A signaling system, comprising a plurality of stations, a source of eratingcurrent at one of said stations, a. signal at-each station, controlling apparatus at each station for operating the signal at said station,

and selecting devices at a plurality of. ,sta-.

tions for calling selectively any desired station, said devices performing their function throughthe agency of the single source of current aforesaid, .in combination with means for selectively changing the polarity of the operating current furnished by said source. 1

2. A signaling system, comprising a plurality of stations, a source of operating current at one'of said stationsunited by a common line circuit, signal receiving apparatus at each station, and associated with said circuit, and calling devices at a plurality of stations for-.operatively actuating any signal receiving apparatus aforesaid independently, said devices performing their functions through the agency of the single source of current aforesaid, in combination with means 'for selectively changing the polarity of the operating current furnished by said source. a I

3. A signal system, comprising a plurality of stations united by a common line.

circuit, a source of operating current at one of said stations, signal-receiving apparatus at each stat on and associated with sald 011'- cuit, calling devices at a plurality ofstations for operatively actuating any signalreceiving apparatus aforesaid independently, and instrumentalities operable from a plurality of stations for restoring said signal-receiving apparatus to normal after operation, said instrumentalities including means for selectively changing the polarity of the operating current furnished by said source. Y I p 4. A signalsystem, comprising a. plurality of stations, a source of operating current at one of said stations, asignal at each station, controllingapparatusat each.

station for operatingits associated signal,-

and. selecting"devices at a plurality of. stations fonselectirfeiy actuating said controlling apparatus to operate any desired signal. said devlccspcr'form mg their functrolling apparatus to operate any desired" signal. said devices performing'their functions through the agency of-the'singlc source tions through the agency of the-single source of current aforesaid, in combination w th means for selectlvely changing the polarity of the operating current furnished by saidselecting devices at a plurality of .lsta -ff tions for selectively actuating said fconof current aforesaid, and instrumentalities operable from a plurality of stations for restoring said controlling apparatus to normal after operation, said instrumentalities including means for selectively changing the polarity of the operating current furnished by said source. v

6. A signaling system, comprising a plurality of stations, a source of operating current at one of said stations, a signal at each'station. controlling apparatus at each.

station for operating its associated signall a common line circuit with which said controlling apparatus is opcratively associated, and selecting devices at a plurality of stations for selectivelyactuatingsaid controlling apparatus to operate any desiredsignal, said devices performing their-fun ti'onsthrough the agency of the single source? of current aforesaid, in-tombinatr'OnWith means for selectively changing the .pol of the operating current furnishedh" source. r i" 7.' A signaling system, comprising rent at one of saidstationspa' signal-fat each station, controlling apparatus at each?- station for operating its associated signal,

a common line circuit 'with which: controllmg apparatus is operatlvelv associated, selecting devices at aplurality of J stations for selectively actuating said con-" trolling apparatus to operate any desired signal, said devices performing their functions through theagency of the single source of current EfOI'GSflld, and instrumentalities operable from a plurality of stations for changingthe polarity of the current impressed on the circuit by said source where by'to restore said. controlling apparatus to normal after operation.

8. A signaling system, comprising a plurality of stations, :1 source of operating current at one of said stations, a signal at each station, controlling apparatus ateach station for operating its associated signal, a common line circuit. with which said controlling apparatus is operatively associated, and selecting devices at a'plurality' of stations and operative over said line cirrality of sta-t1ons,'a source of peemting arcuit, for selectively actuating said controlthrough theagency of the single source current aforesaid, in comb nation 'Wlill the agency of the single source of current aforesaid, andinstrumentalities operable from a plurality of stations for changing the polarity of the current iln ressed on the circuit by said source where y 'torestore said controlling apparatus to normal after.- operatlon.

10. A signaling system, comprisii'igzaplurality of stations, a source of operatlng current. at one of said stations, an electm 'magnetic device, a signal at each station,'controlling apparatus at each station for 0 eriating its-associated si 1al,a common ine circuit with .which'sai' controlling a para- .is, 'operative1y associated, and se ecting devices at a plurality of stations and operative -over"-"said line circuit, tor selectively "actuating said controlling apparatus toope of said electromagnetic device governin the operativeinclusion of current "supp ying means aforesaid with said line circuit.

11.. A signaling system, comprising a plu jrality of-stations, a source of operating current at one of said stations, an-electro-mag' {netic dcvi a signal at each station, controlling apparatus at each station for 0 er- .ating its associated signal, a common ine circuit with which said controlling apparatus is operatively associated, selecting devices at a lurality of stations and operative over said ine circuit for selectively actuating said controlling apparatus to operate any desired signal through the agency-of said electro-magneticdevice governin the operative inclusion of current" supp ying means aforesaid with said line circuit,,and instrumentalities operable from a of stations for restoring said contro ling apparatus to normal after operation.

12. A signaling system, comprising a plu- -vice, a signal at eacl station, controlling apparatus at each station for operating lts assoclated signal, a common lme circuit with ling apparatus to operate any desired signahj said devices performing their functions;

means for selectively changing the polarity. of the operating current furnished by said,

each station, controlling apparatus at each I acommon line circuit with which said sociated, selecting devices at a plurality of,

paratus to operate any desired s1gnal,fsaid devices performing their functions through.

rate any desired signal, through the agency luralitzy rality of stations, an electro-magn'eticIdewhich said controlling apparatus is opervatively associated, selecting devices at- -a pluralit-y of stations and operative over said line circuit ,for selectively actuatin said control-ling apparatus to operate an esired signal l'lll'tfll'gll the agency;v ofsai electro- "magnetic devicegoverningthe operative inclusion of current supplying means withsaid line circuit, and instrumentalities operable from a plurallty'of-stations for restoring said controlling-apparatus to normal after operation, said last aforesaid instrumentalitles including a releasing" devl'ce at each station.

13.- A signaling system, comprising a pluralit'y of stations, anelectromagnetic de'- vice,'a signalateach station, controlling apparatus at each station-for operating'its associated' signal, a common line circuit with which said controlling apparatus is operatively associated, selecting devices at' a plurality of stations and I operative over said line circuit for selectively actuating said controlling apparatus to operate'any' desired signal. through the agency ofsaid electromagnetic device governing the operative inclusion of currentsupplying means with said jline circuit, instrumentalities operable from a plurality of stations "for restoring and controlling app-aratu's to normal after operation, said last aforesaid instrumentalit1es'including'a releasing device at each station, and a slow acting device for controlling the operations ofsaid releasing device,

14. A signaling system, comprising a. Cell- 'tral station, and apluralit-y of substations a slow acting united by a common linejcircuit, a signal at each substation, controlling means at each sul istation and associated with said line circan: for operating wlien'properly actuated its associated signal, instrumientalities at the central station for selectively operating the controlling means aforesaid, instrumental1-' ties at the central stationfor restoring said controlling means to normal after operation,-

and devices at' a' plurality of substations for o erati'ng'a t will the two last aforesaid ins rumenta'lities.

151 A signaling system comprising a central station and v a plurality f. Substations united by; common -1ine "circi1it, a signal at eachsubstation, controlling means at; each substation and associatedwith said-line clrcuit for operating when properly; actuated.

its associated signal, instrumentalities at the central station for selectively o crating. the

controlling means aforesaid, sfar instrumenv talities including current supplying v means, device at. each substation co: operating w th said instrumentalities, instrumentalities at the central station for re storing 'said controlling Qmean'sfto normal after operation, and devices at a lurality of substations for performing at wi l the functions of the two last aforesaid instrumen- 't-alities.

16. A signaling system, comprising a central station and a plurality of substations united by a common line circuit, a signal: at each substation, controlling means at each substation and associated with said line circuit for operating when 'properlyj'actuatcd its associated signal, instrumentalities at the central station for selectivelybperating the controlling means aforesaid, said instrumentalitiesincluding current supplying means,

a slow acting device at each substation c 0- operating with said instrumentalities, instrumentalities at the central station for restoring said controlling means to normal after operation, devices at a plurality of substations for performingatwill the firm tions of 'the'two last- .a-foresaid instrumentalities, through the agency of anclectromagnet operatively associated with the first aforesaid instrumentality, and a'second electromagnet associated with a slow acting 'circuit closing device.-

17. A signaling system, comprising a pluralit-yof stations, on the same circuit, a central source ofoperating current at one'of said stations, each station having a'signal', and means at each station for selectively operating any desired signal through the agency of the "central source of current aforesaid in combination with means for selectively changing the polarity'ot'the operating-current furni'shed' bysaid source.

18. A signaling system comprising a pluralityof stations all onthe same circuit, a signal at each station, selectisaej controlling apparatus for each signal, a; central station with devices for selectively operating the controlling apparatus toca'llmy desired station, and instrumentalit-ies at a plurality of stations for operating over the said same circuit, the devices aforesaid.

' 19. A signa-l ng system comprising a p'lu-v rality of stations all on the same c1rcuit, a signal at each station, selective cont-rolling apparatus for each signal, a central station with devices for selectively'operatin g the controllin stat-ion anfi release same, and instrumentalities at a plurality of stations ,for operating over thesaid saniccircuit the devices afore said.

In witness whereof, Ifhereunto subscribe my name this'third day of August A, D., 1908. I; 7 1 f EMO Y SQ S- -Witnesses: V-

"E 'B. CAMPBELL, MAxW. ZABEL, i

apparatus to call any desired 

